Instructables

How To Make A Cheap USB Powered Fan

Step 5: Making the conections permenant.

Now that the fan works successfully, its time to solder the USB power wires to the battery terminals to make the connections more permenant and stable.

NOTE: After completing this instructable, I've discovered that the USB port is too powerful fo the fan I chose so a resistor wired in series before the connection to the fan would help lower the power and therefore not overload the fan/motor. This is as simple as soldering a resistor of high enough resistance to decrease the voltage to around 3 volts (from thew 5 that USB puts out).
 
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